Turret type universal milling, drilling and boring machine

ABSTRACT

A universal milling, drilling and boring machine for a plurality of rotary tools includes a headstock having a drive. The headstock comprises a drum rotatably mounted thereto and equipped with a number of spindle units for the rotary tools which units are rotatably mounted on the drum and which in normal position are oriented at least substantially parallel with the axis of rotation of the drum. The headstock has an operating unit which is adapted to swing the spindle unit opposite the drive into operative position in the headstock, in which position the drive is connectable to the spindle unit.

United States Patent 1 Svanstriim Aug. 14, 1973 TURRET TYPE UNIVERSALMILLING, R25,67O 10/1964 Hansen et al. 408/35 DRILLING AND BORINGMACHINE Inventor: Sven-Erik Svanstriim, Vasteras,

Sweden Assignee: SMT Machine Company AB,

. Vasteras, Sweden Filed: Nov. 19, 1971 Appl. No.: 200,333

Foreign Application Priority Data Dec. 7, 1970 Sweden 16491/70References Cited UNITED STATES PATENTS 10/1967 Zucchellini 29/568Primary Examiner-Francis S. I-Iusar Attorney-Karl W. Flocks ABSTRACT Auniversal milling, drilling and boring machine for a plurality of rotarytools includes a headstock having a drive. The headstock comprises adrum rotatably mounted thereto and equipped with a number of spindleunits for the rotary tools which units are rotatably mounted on the drumand which in normal position are oriented at least substantiallyparallel with the axis of rotation of the drum. The headstock has anoperating unit which is adapted to swing the spindle unit opposite thedrive into operative position in the headstock, in which position thedrive is connectable to the spindle unit.

5 Claims, 3 Drawing Figures TURRET TYPE UNIVERSAL MILLING, DRILLING ANDBORING MACHINE This invention relates to a universal milling, drillingand boring machine for a plurality of rotary tools, including aheadstock having a drive. In the machine according to the invention theheadstock comprises at least one drum rotatably mounted thereto andequipped with a number of spindle units for the rotary tools which unitsare rotatably mounted on the drum and in normal position are oriented atleast substantially parallel with'the axis of rotation of the drum, andan operating unit is provided in said headstock and adapted to swing thespindle unit opposite the drive into operative position in theheadstock, in which position the drive is connectable to the spindleunit.

The universal milling, drilling and boring machine according to theinvention is for use in automatized milling, drilling, boring and threadcutting operations and in performing a relatively large number of partopera tions on a workpiece by different rotary tools. Compared to theturret machine, the machine according to the present invention primarilyentails the advantage of accommodating a larger number of tools.Compared to so-called multiple purpose machines in which the tools arechanged over from a magazine to the spindle and vice versa, the machineaccording to the invention above all implies great economicaladvantages.

One embodiment of the invention will be more fully described hereinbelowwith reference to the accompanying drawing in which:

FIG. 1 is a side view of the machine;

FIG. 2 is a longitudinal section of parts of the headstock; and

FIG. 3 is a plan view, partly in section, of some of the parts shown inFIG. 2.

The machine is an upright milling, drilling, boring and thread cuttingmachine and the headstock 2 is mounted to the post 1 of the machine. Theheadstock 2 is adapted to be moved vertically towards the coordinatetable 4 for the workpiece.

The headstock 2 has a drive 5 comprising a gearing system and a drivemotor, the output shaft of the gearing system being designated 6 in FIG.2. The headstock 2 also has a drum 7 rotatably mounted thereto andequipped with a number of spindle units 8 for the rotary tools 9. Thespindle units 8 are pivotally mounted to the drum and adapted normallyto be oriented at least substantially parallel with the axis of rotationof the drum 7.

The headstock 2 has an operating mechanism 10 in the form of a cylinderand piston assembly which is adapted to swing the spindle unit 8oppositethe drive 5 into operative position at right angles to the axis of thedrum 7, as will be seen from FIG. 2. In the operative position the drive5 is connectable to the spindle unit 8 in that the spline sleeve 11 onthe output shaft 6 of the gearing system is moved downward, uniting thespindle unit 8 with the drive motor. Operation can now start.

Each of the spindle units 8 is composed of an inner rotary tool-carryingspindle l2 and an outer housing 13 surrounding the spindle 12, saidhousing 13 being pivotally mounted to the drum 7 by means ofjournals 14.

The operating mechanism 10 which is common to all spindle units 8 isarranged in the center of the headstock 2. To permit the operatingmechanism 10 to be coupled with the different spindle units 8, saidunits have an operating rod 15 with a fork-shaped shifter 16. Theshifter 16 engages a projection 17 on the piston rod 18 of the cylinderand piston assembly 10 and actuates the respective spindle unit 8 viathe operating rod 15 and a link 19 by engaging a swing arm 20 mounted onthe journal 14.

As will appear from FIG. 3, the headstock 2 has engagement surfaces 21against which the housings 13 of the spindle units 8 are adapted to bearin the operative position, whereby said position is exactly determined.For their fixation in the operative positions determined by theengagement surfaces 21 the spindle units 8 are adapted to coact with adriving key transmission 22.

After accomplished operating cycle the spindle unit 8 is released andswung into its horizontal storage position in which it is parallel withthe axis of rotation of the drum 7. The drum can now be indexed by onestep so that the next spindle unit 8 is brought in position for beingswung into operative position.

In the embodiment illustrated the drum 7 has twelve spindle units 8 butthe number of spindle units can be varied within broad limits. i

What I claim and desire to secure by Letters Patent 1. A universalmilling, drilling and boring machine for a plurality of rotary tools,including a headstock having a drive, wherein the headstock comprises atleast one drum rotatably mounted thereto and equipped with a number ofspindle units for the rotary tools which units are rotatably mounted onthe drum and in normal position are oriented at least substantiallyparallel with the axis of rotation of the drum, and an operating unit isprovided in said headstock selectively connectable with said spindleunits for pivoting the spindle unit opposite the drive into operativeposition in the headstock, in which position the drive is connectable tothe spindle unit.

2. A machineas claimed in claim I, wherein each of the spindle units iscomposed of an inner rotary toolcarrying spindle and a housingsurrounding the spindle and pivotally mounted to the drum.

3. A machine as claimed in claim 1, wherein the operating unit is acylinder and piston or like unit which is connectable with the differentspindle units.

4. A machine as claimed in any of claim 1, wherein the headstock hasengagement surfaces against which the spindle units bear in operativeposition.

5. A machine as claimed in claim 4, wherein the spindle units when inoperative position coact with a clamping device.

1. A universal milling, drilling and boring machine for a plurality ofrotary tools, including a headstock having a drive, wherein theheadstock comprises at least one drum rotatably mounted thereto andequipped with a number of spindle units for the rotary tools which unitsare rotatably mounted on the drum and in normal position are oriented atleast substantially parallel with the axis of rotation of the drum, andan operating unit is provided in said headstock selectively connectablewith said spindle units for pivoting the spindle unit opposite the driveinto operative position in the headstock, in which position the drive isconnectable to the spindle unit.
 2. A machine as claimed in claim 1,wherein each of the spindle units is composed of an inner rotarytool-carrying spindle and a housing surrounding the spindle andpivotally mounted to the drum.
 3. A machine as claimed in claim 1,wherein the operating unit is a cylinder and piston or like unit whichis connectable with the different spindle units.
 4. A machine as claimedin any of claim 1, wherein the headstock has engagement surfaces againstwhich the spindle units bear in operative position.
 5. A machine asclaimed in claim 4, wherein the spindle units when in operative positioncoact with a clamping device.